package com.hwadee.property.controller.charge;

import cn.hutool.json.JSONObject;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.hwadee.property.config.AliPayConfig;
import com.hwadee.property.pojo.ChargeDetail;
import com.hwadee.property.pojo.ChargeItem;
import com.hwadee.property.service.impl.ChargeDetailServiceImpl;
import com.hwadee.property.service.impl.ChargeItemServiceImpl;
import com.hwadee.property.util.BusinessException;
import com.hwadee.property.util.DateUtil;
import com.hwadee.property.util.ErrorCodes;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.math.BigDecimal;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("/api/alipay")
@Api(tags = "支付宝-AliPayController")
public class AliPayController {

    private static final String GATEWAY_URL = "https://openapi-sandbox.dl.alipaydev.com/gateway.do";
    private static final String FORMAT = "JSON";
    private static final String CHARSET = "UTF-8";
    //签名方式
    private static final String SIGN_TYPE = "RSA2";
    @Resource
    private AliPayConfig aliPayConfig;

    @Autowired
    private ChargeDetailServiceImpl chargeDetailService;

    @Autowired
    private ChargeItemServiceImpl chargeItemService;

    @GetMapping("/pay") // &subject=xxx&traceNo=xxx&totalAmount=xxx
    @ApiOperation(value = "【AliPay】缴费", notes = "用户根据chargeDetailID进行缴费")
    @CrossOrigin
    public void pay(Long chargeDetailId, HttpServletResponse httpResponse) throws Exception {
        ChargeDetail chargeDetail = chargeDetailService.getById(chargeDetailId);
        if (chargeDetail == null) return;

        // 1. 创建Client，通用SDK提供的Client，负责调用支付宝的API
        AlipayClient alipayClient = new DefaultAlipayClient(GATEWAY_URL, aliPayConfig.getAppId(),
                aliPayConfig.getAppPrivateKey(), FORMAT, CHARSET, aliPayConfig.getAlipayPublicKey(), SIGN_TYPE);

        // 2. 创建 Request并设置Request参数
        AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();  // 发送请求的 Request类
        request.setNotifyUrl(aliPayConfig.getNotifyUrl());
        JSONObject bizContent = new JSONObject();
        bizContent.set("out_trade_no", chargeDetail.getTraceNo());       // 我们自己生成的订单编号
        BigDecimal amount = new BigDecimal(chargeDetail.getAmount().toString());
        amount = amount.setScale(2, BigDecimal.ROUND_HALF_UP); // 保留两位小数
        bizContent.set("total_amount", amount.toString());
//        bizContent.set("total_amount", chargeDetail.getAmount());   // 订单的总金额

        ChargeItem chargeItem = chargeItemService.getById(chargeDetail.getChargeId());

        bizContent.set("subject", chargeItem.getChargeName());            // 支付的名称

        bizContent.set("product_code", "FAST_INSTANT_TRADE_PAY");  // 固定配置
        request.setBizContent(bizContent.toString());
        // TODO: 支付完成后从阿里的支付界面跳转回的页面指向修改
        //       request.setReturnUrl("");
        request.setReturnUrl("localhost:5173/#/payment-center");
        // 执行请求，拿到响应的结果，返回给浏览器
        String form = "";
        try {
            form = alipayClient.pageExecute(request).getBody(); // 调用SDK生成表单
        } catch (AlipayApiException e) {
            throw new BusinessException(ErrorCodes.UNKNOWN_ERROR, "生成支付表单失败：" + e.getMessage());
        }
        httpResponse.setContentType("text/html;charset=" + CHARSET);
        httpResponse.getWriter().write(form);// 直接将完整的表单html输出到页面
        httpResponse.getWriter().flush();
        httpResponse.getWriter().close();
    }

    @PostMapping("/notify")  // 注意这里必须是POST接口
    @ApiOperation(value = "【AliPay】参数回调", notes = "提供给alipay官方的回调地址，用于接收回调信息")
    public String payNotify(HttpServletRequest request) throws Exception {
        if (request.getParameter("trade_status").equals("TRADE_SUCCESS")) {
            System.out.println("=========支付宝异步回调========");
            Map<String, String> params = new HashMap<>();
            Map<String, String[]> requestParams = request.getParameterMap();
            for (String name : requestParams.keySet()) {
                params.put(name, request.getParameter(name));
                // System.out.println(name + " = " + request.getParameter(name));
            }

            String tradeNo = params.get("out_trade_no");
            String gmtPayment = params.get("gmt_payment");
            String alipayTradeNo = params.get("trade_no");

            String sign = params.get("sign");
            String content = AlipaySignature.getSignCheckContentV1(params);
            boolean checkSignature = AlipaySignature.rsa256CheckContent(content, sign, aliPayConfig.getAlipayPublicKey(), "UTF-8"); // 验证签名
            // 支付宝验签
            if (checkSignature) {
                // 验签通过
                System.out.println("交易名称: " + params.get("subject"));
                System.out.println("交易状态: " + params.get("trade_status"));
                System.out.println("支付宝交易凭证号: " + params.get("trade_no"));
                System.out.println("商户订单号: " + params.get("out_trade_no"));
                System.out.println("交易金额: " + params.get("total_amount"));
                System.out.println("买家在支付宝唯一id: " + params.get("buyer_id"));
                System.out.println("买家付款时间: " + params.get("gmt_payment"));
                System.out.println("买家付款金额: " + params.get("buyer_pay_amount"));

                // 更新订单未已支付
                ChargeDetail chargeDetail = chargeDetailService.getByTradeNo(tradeNo);
                chargeDetail.setPaymentStatus(1);
                chargeDetail.setPaymentDate(DateUtil.dateToString(new Date()));
                chargeDetail.setAlipayTraceNo(alipayTradeNo);
                chargeDetailService.updateById(chargeDetail);
            }
        }
        return "success";
    }
}
